Western Azalea
(Rhododendron occidentale)
 

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The Western azalea occurs under moist conditions in streambank and wetland habitats at elevations to 7,500 feet.   It is a loosely branched deciduous shrub, 3 to 10 feet high.  The foliage may be poisonous to sheep and cattle.  

Rhododendron occidentale is a shrub that is native to California.